Oil pressure is down low on gage at idle, and goes up with rpm


Asked by Aug 19, 2017 at 11:16 PM about the 1990 Toyota Pickup 2 Dr Deluxe 4WD Standard Cab LB

Question type: Maintenance & Repair

My "new to me" 1990 Toyota
pickup v6 3.0L... Is it normal for oil
pressure to fluctuate with R.P.M. s
??? If yes, wouldn't lugging the
engine be extremely harmful?

6 Answers


Idle is enough to build pressure, may could go up alittle but not from say 0 - 40 lbs.

1 people found this helpful.

Thanks for the info... My gage for oil pressure goes from 10-40 with RPMs but only after its warmed up and so Im going to have to replace the oil pump next.... \=°}


As a rule of thumb: 10 psi of oil pressure per 1000 rpms.

2 people found this helpful.

I would check the pressure sender unit to gauge to be sure its fine by testing a known good gauge or tester in place of your gauge.

1 people found this helpful.

I am going to go with your timing chain...the oil pump is driven off that~ so loose chain=lowered pressure~ word~ Jay Q (happy-2-day on deviantart.com)~

1 people found this helpful.

Awesome Answers! Thanks so much for the input! It really has helped! ALOT. ;-)

1 people found this helpful.

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